Metallurgical and Materials Transactions B

, Volume 3, Issue 11, pp 2865–2872 | Cite as

Activity of carbon and solubility of carbides in the FCC Fe-Mo-C, Fe-Cr-C, and Fe-V-C alloys

  • T. Wada
  • H. Wada
  • J. F. Elliott
  • J. Chipman
Physical Chemistry


The activity of carbon in austenitic Fe-Mo-C, Fe-Cr-C, and Fe-V-C alloys has been studied by equilibration with controlled CH4-H2 atmospheres at temperatures in the range 850° to 1200°C. The observations included a number of compositions in the two-phase fields, γ + carbide. Equations are given for the activity coefficient of carbon as a function of temperature and composition in the austenite field and from these the other thermodynamic properties of the solution may be computed as desired. The phase boundaries γ/γ + carbide were determined by breaks in the isoactivity lines. This was supplemented in the case of Fe-Mo-C alloys by metallographic linear analysis of equilibrated samples. The results confirm certain published phase diagrams and discredit others.


Carbide Austenite Metallurgical Transaction Phase Boundary Activity Coefficient 
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  1. 1.
    T. Wada, H. Wada, J. F. Elliott, and J. Chipman:Met. Trans., 1971, vol. 2, pp. 2199–2208.CrossRefGoogle Scholar
  2. 2.
    T. Wada, H. Wada, J. F. Elliott, and J. Chipman:Met. Trans., 1972, vol. 3, pp. 1657–62.CrossRefGoogle Scholar
  3. 3.
    S. Ban-ya, J. F. Elliott, and J. Chipman:Met. Trans., 1970, vol. l, p. 1313.CrossRefGoogle Scholar
  4. 4.
    T. Nishizawa:Thermodynamic Study of Fe-C-Mn, Fe-C-Cr and Fe-C-Mo, Report 4602, Swedish Council for Applied Research, Stockholm, 1967.Google Scholar
  5. 5.
    K. Bungardt, E. Schürmann, H. Preisendanz, P. Schüler, and H.-J. Osing:DEW-Tech. Ber., 1969, vol. 9, pp. 439–62.Google Scholar
  6. 6.
    K. Bungardt, H. Preisendanz, and G. Lehnert:Arch. Eisenhüettenw., 1964, vol. 35, p. 999.CrossRefGoogle Scholar
  7. 7.
    R. F. Campbell, S. H. Reynolds, L. W. Ballard, and K. G. Carroll:Trans. TMS-AIME, 1960, vol. 218, pp. 723–32.Google Scholar
  8. 8.
    H. Harvig and B. Uhrenius: Report of Materials Center, Royal Institute Tech-nology, TRITA-MAC-0008,1971.Google Scholar
  9. 9.
    R. T. Howard and M. Cohen:AIME Trans., 1947, vol. 172, pp. 413–26.Google Scholar
  10. 10.
    H. Schenck and H. Kaiser:Arch. Eisenhüettenw., 1960, vol. 31, p. 227.CrossRefGoogle Scholar
  11. 11.
    R. J. Brigham and J. S. Kirkaldy:Trans. TMS-AIME, 1963, vol. 227, p. 538.Google Scholar
  12. 12.
    H. Flender and H. Wever:Arch. Eisenhüettenw., 1963, vol. 34, pp. 727–32.CrossRefGoogle Scholar
  13. 13.
    J. Chipman and E. F. Brush:Trans. TMS-AIME, 1968, vol. 242, pp. 35–41.Google Scholar
  14. 14.
    K. Bungdardt, E. Junze, and E. Horn:Arch. Eisenhüettenw., 1958, vol. 29, p. 193.CrossRefGoogle Scholar
  15. 15.
    R. Ebeling and H. Wever:Arch. Eisenhüettenw., 1969, vol. 40, pp. 551–55.CrossRefGoogle Scholar
  16. 16.
    R. R. Zupp and D. A. Stevenson:Trans. TMS-AIME, 1966, vol. 236, pp. 1316–23.Google Scholar
  17. 17.
    W. L. Worrell and J. Chipman:J. Phys. Chem., 1964, vol. 68, p. 860.CrossRefGoogle Scholar
  18. 18.
    E. K. Storms and R. J. McNeal:J. Phys. Chem., 1962, vol. 66, p. 1401.CrossRefGoogle Scholar
  19. 19.
    N. A. Savorstyanova and L. A. Shvartsman:Phys. Metals Metallogr., 1969, vol. 9, no. 4, p. 35, English ed.Google Scholar
  20. 20.
    K. Narita and S. Koyama:Tetsu-to-Hagane, 1966, vol. 52, pp. 788–91.CrossRefGoogle Scholar
  21. 21.
    W. A. West:Trans. AIME, 1946, vol. 167, pp. 535–49.Google Scholar

Copyright information

© The Metallurgical of Society of AIME 1972

Authors and Affiliations

  • T. Wada
    • 1
  • H. Wada
    • 2
  • J. F. Elliott
    • 3
  • J. Chipman
    • 3
  1. 1.Climax Molybdenum CompanyAnn Arbor
  2. 2.University of MichiganAnn Arbor
  3. 3.Department of Metallurgy and Materials ScienceMassachusetts Institute of TechnologyUSA

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